Seismic 3D Survey Areas - for Petroleum Industry Exploration

The polygons depict the outline of 3D surveys. These outlines illustrate the survey outlines but are not consistently defined. The polygons have been extracted from survey reports but may illustrate surface coverage, full fold coverage or even the final grid definitions. Care should be exercised when using these polygons for anything other than an indication of survey extent.

本次数据集涉及的多边形（polygons）用于呈现三维勘探（3D surveys）的轮廓范围。此类轮廓仅用于示意勘探边界，并未形成统一的定义规范。该类多边形源自勘探报告，但其指代的对象可能为地表覆盖范围、全褶皱覆盖范围，甚至是最终的网格定义。除用于示意勘探范围外，若将此类多边形用于其他用途，需谨慎行事。